Question

Assertion :For a reaction at equilibrium,the Gibb's free energy of reaction is minimum at constant temperature and pressure. Reason: The Gibb's free energy of both reactants and products increases and become equal at equilibrium.

Read the above assertion and reason and choose the correct option regarding it.

• A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
• B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
• C. Assertion is correct but Reason is incorrect
• D. Both Assertion and Reason are incorrect

Answer 1

The correct option is C Assertion is correct but Reason is incorrect

For a reaction at equilibrium, Gibb's free energy of the reaction is minimum at constant temperature and pressure.

$\Delta G=\Delta G^o+RTlnK$ . at equilibrium $\Delta G=0$ Hence, $\Delta G^0$ is minimum at equilibrium.

The Gibb's free energy of both reactants and products become equal at equilibrium. They may increase or decrease.

Hence, Assertion is correct but Reason is incorrect.